Dark matter and brown dwarfs - Prospects for the direct detection of a brown dwarf halo

Details Dark matter and brown dwarfs - Prospects for the direct detection of a brown dwarf halo Dark matter and brown dwarfs - Prospects for the direct detection of a brown dwarf halo

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..423d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 423-430. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

13

Brown Dwarf Stars, Dark Matter, Halos, Milky Way Galaxy, Stellar Radiation, Galactic Clusters, Infrared Astronomy, Infrared Radiation, Stellar Mass

Scientific paper

The possibility of directly detecting IR emission from brown dwarfs is discussed. Attention is given to the direct detection of the emission from brown dwarfs that could comprise the halo dark matter of a nearby galaxy, dark matter in a nearby cluster of galaxies and in distant galaxies and clusters of galaxies, and from individual brown dwarfs within the Milky Way Galaxy. A pointed IR telescope can be used to detect or significantly constrain brown dwarfs as comprising the halo dark matter by observing a nearby galaxy. A survey that covers a significant fraction of the sky, or which covers a small region to a great depth, can be used to detect or significantly constrain brown dwarfs as a halo dark matter candidate by looking for individual brown dwarfs in the solar vicinity. The observing times required to detect or constrain such a halo population of brown dwarfs with an instrument such as SIRTF are discussed. Galaxies and clusters of galaxies at redshifts of about 2 can be detected as strong IR sources if the dark matter in these are comprised of brown dwarfs, and if the brown dwarfs are relatively young (about 10 exp 8 to 10 exp 9 yr).

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